Let cache of 0.7 hit having average access time 9 times faster than that of memory. If average access time increase 40% from 80 ns. What would be the new hit ratio
Q: Question Consider a 4 way set associative cache made up of 64 bit words. The number of words per…
A: GIVEN:
Q: What hit ratio is required to reduce the effective memory access time, from 200 nsecs effective…
A: Given data is effective memory access time from 200 nano - secs to 140 nano-secs
Q: , define Tc= first-level cache access time= 0.2ns; Tm = memory access time= 0.8ns; H= first-level…
A: For a system with single level of cache, define Tc= first-level cache access time= 0.2ns; Tm =…
Q: Assume a cache memory hit ratio is 93% and the hit time is one cycle, but the miss penalty is 40…
A:
Q: Consider a system with 20 requests and out of 20 , 4 requests are already in cache memory. What will…
A: Introduction Consider a system with 20 requests and out of 20 , 4 requests are already in cache…
Q: Consider a direct mapped cache with 4 sets (S), 8 bytes per block (B), with an 8 bit address space.…
A: We are given direct mapped cache with sets, block size and address space. We are going to find out…
Q: Consider an L1 cache with an access time of 1 ns and a hit ratio of Suppose that we can change the…
A: Given, cache -L1 Access time T1=1ns Hit ratio H1=0.95 After a change in cache,…
Q: Calculate the block number of the main memory for the address 722542 (decimal).
A: Answer:The block number of the main memory is 5645.
Q: 1. Given the hit ratio of level-1 cache is 0.1 and the access time is 1, the hit ratio of level-2…
A: Given that, level-1 cache Hit ratio = 0.1 level-1 cache access time=1 level-2 cache hit ratio= 0.2…
Q: Calculate the Effective Access Time (EAT) by assuming the Hit ratio (?) 95%. Cache Access Time (ε)…
A: Given, Hit ratio (?)= 0.95 Cache Access Time (ε)=20 microsecond Memory Access Time (T) = 100…
Q: Question 2: Given that the main memory access time is 1200 ns and cache access time is 100 ns. The…
A:
Q: A cache memory has a line size of eight 64-bit words and a capacity of 4K words. The main memory…
A: A 64-bit word means 8 byte.Line size: 8 words in a line, means 8 x 8 bytes = 64 bytes in a line = 26…
Q: HOME WORK#2: If memory size = 16 KB. If cache size = 512 B. If block size = 8 B. Show address fields…
A: Here in this question we have given Main memory size =16KB Cache size = 512 B Blocks size = 8B…
Q: For a system, assume, RAM- 64KB, block size - 4 bytes, cache size - 64 bytes, 2-way set associative…
A: Given : RAM= 64KB, block size = 4 bytes, cache size = 64 bytes, and the mapping is 2-way set…
Q: Suppose the cache access time is 6ns, main memory access time is 140ns, and the cache hit rate is…
A: Here we calculate the Average access time for the processor to access an item by using the given…
Q: Consider a single-level cache with an access time of 2.5 ns, a line size of 64 bytes, and a hit…
A: Introduction :Given , Single level cache cache access time = 2.5 ns line size = 64 Byte Hit ratio =…
Q: Consider a machine with Byte Addressable main Memory of 4 GB ivided in to blocks of size 32 bytes.…
A: Here in this question we have given main memory= 4 GB Block size = 32B Tag = 18 bit Find - no of…
Q: Find the AMAT for a processor with a 1 ns clock cycle time, a miss penalty of 15 clock cycles, a…
A: Given information: Processor clock cycle time=1 ns. Miss penalty=15 clock cycle. Miss rate=0.1…
Q: Consider cache memory 90% hit ratio is required to be installed in a memory system to reduce the…
A: Given, Hit ratio = 90 % Then, Hit rate = 0.9 Miss rate = 1 - hit rate = 1 - 0.9 = 0.1 According to…
Q: suppose the data transfer rate between CPU and a memory is 500bps. Also a
A: Given . Find an average time (TN) to read 50 words of memory. Here we suppose the data transfer…
Q: If memory read cycle takes 100 ns and a cache read cycle takes 20 ns, then for four continuous…
A: Memory Read cycle : 100nsCache Read cycle : 20ns Four continuous reference is done - one reference…
Q: Consider a machine with 4-way set associative data cache of size 32 Kbytes and block size 8 byte.…
A: Given that cache size - 32 Kbytes Block size - 8 bytes Page size - 5 bytes 4- way set…
Q: For a RAM size of 512 KB and a 2-way set - associative cache size of 8 kB with cache block size of…
A: The given cache size is 64 KB and block size is 32 byte, so then the number of blocks will be :…
Q: Consider a 8-way set-associative cache memory unit with a capacity of 262144 bytes is built using a…
A: Let us first derive what is given in the question for better understanding.
Q: Consider the main memory size of 128 kB, Cache sıze of 16 kB, Block sıze of 256 B with Byte…
A: ----------------------------------------------- | Tag | Set Number | Block…
Q: Suppose that the processor has access to three levels of cache memory. Level 1 has an access time of…
A: Given : Suppose that the processor has access to three levels of cache memory. Level 1 has an…
Q: For a system, assume, RAM= 64KB, block size = 4 bytes, cache size = 64 bytes, 2-way set associative…
A: Given : RAM= 64KB, block size = 4 bytes, cache size = 64 bytes, and the mapping is 2-way set…
Q: Given that the main memory access time is 1200 ns and cache access time is 100 ns. The average…
A: Let the hit ratio be h, cache access time be C, and memory access time be M.We know that average…
Q: Suppose 93% of the memory accesses found in cache then what is average time to access a byte if…
A: Memory: The computer contains memory space, similar to humans where humans contain memory where they…
Q: Consider a 512 KB cache system used in our laptop. The access time for the cache is 25 ns, and the…
A: Your answer is given below in detail.
Q: (25p)Consider a computer with the following characteristics • total of 1Mbyte of main memory • word…
A: Memory = 1MB => 20 bits. Block size = 64B=> Block Offset = log 64 = 6 bits.
Q: certain processor, a Read request takes 80 nano seconds on a niss and 10 nano seconds on a cache…
A: The answer is given below Ans =0.9 x 10 + 0.2 x 80 = 25
Q: 2- Consider a computer with the following characteristics: total of 1Mbyte of main memory; word size…
A: According to the information given:- we have to follow the instruction and find the cache line and…
Q: Consider a cache memory with blocks of 23 words (1 word = 4 bytes), with a bus Main Memory - Cache…
A: Cache memory is divided into sets of k blocks in a k-way set associate mapping. Size of Cache memory…
Q: Consider a memory system with cache access time of 0.1 us and memory access time (time needed to…
A:
Q: Consider a two level cache system. For 100 memory references, 20 misses in the first lyel cache and…
A: Introduction : given , 2 level cache system. Total memory reference = 100. 20 miss in level 1. 6…
Q: A memory system consists of a cache with a hit time of 5 nsec, if the miss penalty is 100 nsec and…
A: Here we calculate the Cache hit rate by using the given information and correct the answer , so the…
Q: What hit ratio is required to reduce the effective memory access time, from 200 nsecs to 140 nsecs,…
A: Introduction :
Q: For an 8-word wide cache with the following access times: L1: 10 bus cycles, L2: 500 bus cycles,…
A: An 8 word wide cache contains:- 8 * 4B= 32B : 1 word 4B Miss penalty = L1+L2*8 words =…
Q: Consider a fully associative cache with a total of 8 cache blocks (0-7). The main memory block…
A: i) Given 4, 3, 25, 8, 19, 6, 25, 8, 16, 35, 45, 22, 8, 3, 16, 25, 7 So from 0 to 7, we have 4 3 25…
Q: 11. Suppose the time to service a page fault is on the average 10 milliseconds, while a memory…
A: Introduction
Q: Assuming a base CPI of 1.0 without any memory stalls, what is the total CPI for P1 with the addition…
A: Given: Base CPI=1.0 Assumption: Assume that main memory accesses take 70 ns. Assume that, number of…
Q: Consider a system with 2-level cache, at 0.6 hit ratio in level 1 memory. The L1 memory is 4 times…
A: There is a decrease of ≈ 44%.
Q: Consider a cache of 4 K blocks, a 4 word block size and a 32 bit address main memory. What is the…
A: The total number of tag bits per set for 4-way set associative cache
Q: In paging (given diagram), for CPU request there are two access time one for accessing page table…
A: In paging (given diagram), for CPU request there are two access time one for accessing page table…
Q: If a direct mapped cache has a hit rate of 95%, a hit time of 4 ns, and a miss penalty of 100 ns, If…
A: Introduction :
Q: ngle level of cache, define Tc= first-level cache access time; Tm = memory access time;H=…
A: For a system with single level of cache, define Tc= first-level cache access time; Tm = memory…
Q: Upload answer sheets Test time left: 0: Consider a 8-way set associative mapped cache of size 64 MB…
A: Here in this question we have given set associative cache memory Where cache size= 64MB Main memory…
Q: Consider a three-level memory system, where the access time for the cache is T1 nanoseconds, main…
A: Given Information of 3-level Memory System- Cache access time = T1 nanoseconds Main Memory access…
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- A cache memory has a line size of eight 64-bit words and a capacity of 4K words. The main memory size that is cacheable is 1024 Mbits. Assuming 4-way set associative mapping and that the addressing is done at the byte level. What is the format of the main memory addresses (i.e s-d, d, and w)? For the hexadecimal main memory location 2BFACEDH, find the corresponding 4-way set-associative memory formatAn university student was trying improve the performance of one of the test computers. Computer initially had 2-way set associative mapping with 16kb cache and 128 KB byte addressable main memory with 256 bytes block size. It was later decided to change it to 4-way cache. Will there be an increase or decrease in tag directory size due to this change? By how much?.Given that a 4-way set associative cache memory has 64 KB data and each block contains 32 bytes. The main memory capacity is 4 GB. a. Find the number of bits for the main memory address. ANSWER: b. How many blocks are there in a set? ANSWER: c. How many sets the cache has? ANSWER: d. The main memory address format is => | Tag: bits | blocks sets bits | Set: e. Which set will be mapped by the main memory address 458195h. ANSWER: decimal) bits bits | Word: (in
- 1. CPU with 2ns clock, hit time = 1 cycle, miss penalty = 40 cycles, cache hit rate = 90% AMAT = ___ ns.? 2. A memory system with cache memory has an 8-bit word address. Each memory block (or cache line) consists of 4 words. How many bits are used for the word offset in an address? 3. A memory system with cache memory has an 8-bit word address. The direct-mapped mapping technique is used. The cache memory has 8 cache blocks. How many bits are used for the block index field in an address?A 32-bit computer has a memory of 256 KB and a cache line size of 64 bytes. The memory cache access time is 5ns. This cache is 4-way associative and use LRU as a replacement algorithm. a) What is the number of lines and sets of this memory cache? b) What is the block size transferred between the cache memory and the main memory? c) If the time to transfer a line to cache memory is 200 ns, what is the hit ratio needed to obtain an average access time of 20 ns?Given that a 4-way set associative cache memory has 64 KB data and each block contains 32 bytes. The main memory capacity is 4 GB. a. Find the number of bits for the main memory address. ANSWER: bits b. How many blocks are there in a set? ANSWER: blocks c. How many sets the cache has? ANSWER: d. The main memory address format is => | Tag: e. Which set will be mapped by the main memory address 458195h. ANSWER: sets bits | Set: bits | Word: bits | (in decimal)
- A system with simple paged memory management has addresses of B bits and pages of size P KiB. If all memory is pageable, what is the maximum number of items contained in a process's page table? What if K KiB are reserved for the kernel and are not pageable? Also suppose that the page table is organized in 2 levels, so that the page directory (first level) is addressed by D bits. How many bits will be used to address the second level? How many entries will there be, at most, among all the tables of the pages (first and second level) of a process?Suppose a computer using 8-way set associative cache has 1 M words of main memory, and a cache of 16 K words, where each cache block contains 8 words. What is the format of a memory address as seen by the cache, i.e., what are the sizes of the tag, set, and ?word fields Tag = 9-bit, Set = 8-bit, Word = 3-bit Tag = 9-bit, Set = 7-bit, Word =4-bit Tag = 9-bit, Set = 6-bit, Word = 5-bit Tag = 9-bit, Set = 5-bit, Word = 6-bitYou play the role of the instructor of CPSC440. Your CPSC440 students need more practice on the cache memory concept. You, as a professor of the CPSC440 course, decide to solve one more cache memory access problem (in addition to two problems in our Assignment). The new problem is: You are given a direct-mapped cache of 4 blocks with four-word per block (a total of 16 words in the cache). The main memory size is 64 words. We have the following memory access sequence: Word1, Word 8, Word0, Word 17, Word 14, Word 62, Word 55, Word 25, Word 16, and Word 15. You need to write an essay that explains how you solve this problem. You also need to show your students the final cache content using the given table shown below.You also need to explain to your students the result of hit or miss for each word access.
- Calculate the hit time at L2 cache in a 1.3GHz. processor assuming that the global average memory access time is 5.81 cycles, the hit rate at L1 is 0.91%, the miss penalty at L2 is 88 cycles, the number of misses at L2 is 52 and the number of misses at L1 is 4109. Give the result in ns.Suppose cache has a hit rate of 0.89 and access time of 5ns, main memory has a hit rate of 0.98 and access time of 60ns, and virtual memory has an access time of 700 us (microseconds). What is the average memory access time in us?In a main memory-disk virtual storage system, the page size is 1KByte and the OPTIMAL algorithm is used for page replacements. A given program has been allocated three page frames in the main memory and it makes the following 16 memory references when it starts executing (the addresses are given in decimal):500, 2000, 2500, 800, 4000, 1000, 5500, 1500, 2800, 400, 5000, 700, 2100, 3500, 900, 2400 Fill in the contents of the three page frames after each memory reference in a table and calculate the hit ratio. Hint: denote by 'a' the page consisting of locations 0 through 1023 in memory. Similarly, b: 1024-2047, c: 2048-3071, d: 3072-4095, e: 4096-5119 and f: 5120-6143. Round to three decimal places.